Loop bench

local SysTime = SysTime
local print = print

local t = {}
for i = 1, 1e3 do
	t[i] = i
end

do
	local function b(t)
		local total = 0

		for _, v in ipairs(t) do
			total = total + v
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("ipairs", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0

		for i = 1, 1e3 do
			total = total + t[i]
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("for", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0

		for i = 1e3, 1, -1 do
			total = total + t[i]
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("reverse for", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 0

		::GOTO::
			i = i + 1
			total = total + t[i]
		if (i ~= 1e3) then
			goto GOTO
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("goto", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 1e3

		::GOTO_REVERSE::
			total = total + t[i]
			i = i - 1
		if (i ~= 0) then
			goto GOTO_REVERSE
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("reverse goto", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 0

		while (i ~= 1e3) do
			i = i + 1
			total = total + t[i]
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("while", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 1e3

		while (i ~= 0) do
			total = total + t[i]
			i = i - 1
		end
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("reverse while", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 0

		repeat
			i = i + 1
			total = total + t[i]
		until (i == 1e3)
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("repeat until", SysTime() - nStart)
end

do
	local function b(t)
		local total = 0
		local i = 1e3

		repeat
			total = total + t[i]
			i = i - 1
		until (i == 0)
	end

	local nStart = SysTime()

	for i = 1, 1e6 do
		b(t)
	end

	print("reverse repeat until", SysTime() - nStart)
end